Piston and connecting-rod coupling



April 1 1924. 1,488,989

J. F. KRUCHTEN PISTON AND CbNNECTING ROD COUPLING Filed Oct. 5 v 1922 is a specification.

Patented Apr. 1, 1924.

" UNITED STATES PATENT orrlcr...

JOHN F. KnUcH'r-nN, o BUFFALO, nnwyoax.

rrs'ron nn conNEcTrNG-non ooUPLIiIG.

' App1ication filed October 7, 1 22. Serial no. 593,128;

To all whom it mag concern:

\ citizen of the United States, residing in Buffalo, in the county of Erie and State Be it known that I, JoHNF. KRUCHTEN',

"of New Yoi'l ,'have invented new and use-- 'ful Improvements in Piston and Connecting-Rod Couplings, of which the following This invention relates to a piston and connecting rod coupling whereby a pistonnow generally found on the market, so that no departure from the general practice is necessary in order to embody this invention in the well known types ofgas engines.

,Inthe accompanying drawingsrFigure 1 is alongitudinal section of a piston and connecting rod which are connected .by one form'of my improvement. Figure 2 is a lon itudinal sect-ion, taken on line 22, Fig. i 1. igure 3 is a perspective view; of the bearting member which is interposed between the 'fiPlStOIl pin of the connecting rod in the coni struction' shown in Figs. 1 and 2. Figure 4 is a longitudinal section showing another form of joint between the piston and connecting. rod containing my invention. Figure 5 is a longitudinal section on the correspondingly numbered line in Fig. 4. Figure 6 is a perspective view of a form of bearing associated with the parts shown in Figs. 4 and 5. Figure 7 is a sectional View of a connecting rod having an integral spherical socket, and a two part bearing piece seated with its spherical surface in said socket, in accordance with my invention. Figure 8 is a longitudinal section taken on line 8-8, Fig. 7.

Similar characters of reference refer to like parts throughout the several views.

The piston in connection with which my invention is shown in the drawings is of the usual well known or standard type having a cylindrical body 10, which is open at its'lower or'rearend while its upper '01,

front end is closed by meansof aheaclll,

and the inner side' of this body isprovided on diametrically opposite sides Iwith bearing lugs 12 provided with circular; openings which fare transversely in line with each,

other.

. In theconstructi'on shown in 2, the piston in 13, preferablyzof usual.

hollow *form, is arranged transversely, ,of theipiston and seated 'atits oppositeendfs in the opening of the clampinglugs=12..;A s .5:

shown this piston pin may be held against movement in the piston by means ofia looking pin 14 passing through 0118*.0fii3l16 bear ing lugsin the adjacent end. ofthepist n' pin' or any other suitable means-.may Qbe employed for thispurpose, ifdesired.

Upon the central part of the piston-pin and 'between 'the opposing innerwends-of thebearing lugs 121s arranged-a bearing member which has 'a'oentralspherical part 15 and-a cylindrical end portion \l6, -the-laxis of the spherical part l5intersecting the axis of the piston pin,.and the bore of the open ing in this bearin g member, which receives the piston pin being concentric. with the 'cy; 3:

lindrical end portion 16 ofthe bearing member and the piston pin. The member 15 is divided diametrically into two like sections 27 so as to form allongitudinaldiametric-al joint 21 between the same.

17 representsna connecting rod or pitin-an,

which-is provided at its upper orfront end with a spherical socket or seat 18 Which receives the spherical central part of the bearing member. In order to permit of making the bearing member in one piece and still enable the socket of the connecting rod to be applied thereto, this socket is split on its diametrically Opposite sides and the sections of this socket on opposite sides of the split between the same may be connected by means of bolts 19 passing through corresponding lugs 20 on these sections. as shown in Fig. 2, or by any other suitable means.

The piston, piston pin and connecting rod are preferably constructed of ferrous metal while the bearing member is preferably constructed of bronze or similar metal, thereby insuring long life to the joint between the piston and connecting rod and avoiding the necessity of frequent repairs.

By means of this, construction a ball and socket joint cal portions of the: bearing member and the connecting rod which permits the piston to alineitself with the axis. of thecylinder in which the same reciprocates and totravel freely therein without any cramping action in the connection betweenthe piston and .connecting'rod, as would be liable to occur if the axis of the cylinder is not perfectl at right angles-to shaft with which the connecting rod is associated. The wear on the peripheries of the piston and: the bore of the cylinder is therefore reduced-to a minimum and avoids any'unbalanced lateral pressure. of the piston against the cylinder which ordinarily would cause-the cylinder, towear oval and produce a leaky joint between. the same and the piston, as well as producing the objectionabl'e action commonlyknown as piston-slap.

In the alternative con truction of my invention shown in Figs. 4:, 5' and 6,. the hearing member is divided diametrically and lengthwise into two like sections 27 so as to form a longitudinal din-metrical joint 21 be-- tween-the same. These two sections ar preferably mounted on oppositesides of the blushing 22 whichv is arranged upon the piston pinbetween the. bearing lugs of the piston so that together these twosections of the bearing member form a. spherical central bearing surface and two cylindrical p01" tions or necks on opposite sidesof' the spherical portion, in substantially .thesame form asthat shown and described withv reference to Figs. 1, 2 and 3.

In the construction shown in Figs. 4 and 5, the connecting rod 17 has its spherical socket 23 which. receives the spherical sur-;

faces of the bearing member provided only with a single split 24 adjacent to the body of the connecting rod, the ends oi this is produced between the spherithe axis of the cran same may be turned into their socket on opposite sides of this split being connected by means of a bolt 25..

In order to introduce the two sections of the split bearing member into the socket 23 the split parts of the latter are spread sulficiently'for this purpose and after such introduction of the bearing member, the bolt: 2.5 is tightened for th purpose of closely engaging the spherical surfaces of the hear.- ing member and the socket to avoid undue wear and rattling.

If desired, the socket 26 of the connect- 55 ing rod 17 out a split in any part thereof, as shown, in Figs. 7 and S in which case the socket and sections of the bearing member must be made of such shape that these bearing members may be introduced into the socket 26 through the openingsat opposite ends. thereof by introducing one oi these sections at an angle into the socket through one of the end openings of th same and introducing the other section of the bearing member at an angle through the openingin the opposite end of the socket, which positionv of these bearing sections is indicated by dotted lines in Fig. 7. After such introduction of these bearing sections into the socket, the

normal position indicated by full lines in Fig. 7 ready to be assembled by the piston pin with the piston, similar to the constructions previ ously described. I claim as my invention r l A piston, a piston pin mounted transversely on said piston, a bearingmembei mounted on said pin and having a spherical portion, and a connecting rod having a spherical socket which receives said spherical portion, said bearing member being divided lengthwise and diametrically into like sections.

JOHN 1 KRUCHTEN.

may be made integral and withy 

